[TRNSYS-users] (no subject)

[David Bradley]

Sek,
 There is a feature in TRNBuild that allows you to have Type56 
automatically calculate a natural convection heat transfer coefficient 
for interior floors, walls, and ceilings. You select this option when 
you are defining the wall and its layers. The assumption is that 
external surfaces (surfaces on the outside of the building) are governed 
by forced convection, not natural convection and so if Type56 encounters 
an outside surface that has the "internal calculation" option selected 
for the convective heat transfer coefficient calculation method, it 
generates an error. What you need to do is look for surface 5 in your 
building (the surface number is displayed next to the "geosurf" field 
for each wall in the zone view), then check what wall type has been 
selected for that surface, and make sure that the "back side" convective 
heat transfer coefficient is set to "user defined" and not to "internal 
calculation"
Best,
 David


#SEK JUN-YANG# wrote:
> Dear All,
>  
> During my simulation I have encountered an error message that reads: 
> Error in automatic heat transfer calculation for surface 5 or its 
> adjacent surface. Automatic heat transfer calculation is only allowed 
> on surfaces within a zone. Please check building input file (.bui). 
> Please advice. Thank you.
>  
> Best Regards,
> Sek Jun-Yang
> ------------------------------------------------------------------------
>
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>   

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Thermal Energy System Specialists (TESS), LLC 
David BRADLEY                      22 N. Carroll Street - Suite 370 
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